Those velocities are by no means "hot" in a 22" .257 with 100-grain bullets. Generally 3100 fps is possible at pressures around 60,000 PSI--which is a little less than even the so-called +P pressures--but a lot less than .270 Winchester SAAMI pressures. But whatever....
Agree. I think I could have elaborated a bit more.
43.5 grains of H4350 with a 100 TTSX today chrono'd at 2780. This surprised me, kinda low.
46.0 grains of H4350 with a 100 TTSX gave me about 3080, (same gun with a different barrel, so a bit of an inconsistent variable)
43.5 grains of H4350 with a 100 E-tip gave 3032 fps.
This lead me to believe that the E-tip might be sticky and gets higher pressure with less powder. At least similar velocities with less powder.
Next thing to do is just shoot some groups at these levels and see what it's doing for accuracy. If it doesn't group I'll try to go up a bit higher.
